What is a metallographic test?

A metallographic exam utilizes inverted optical light for inspection of a material microstructure, grain sizing, and can provide clues to the origin of a metal failure. Metallographic exam is often a critical tool for characterizing the extent of cracks and pits.

Is standard for microstructure analysis?

ASTM E407 specifies what etching chemicals (usually acids) and procedures are required to reveal the microstructure of different types of metals. Carbon steel has several structures such as ferrite, pearlite, and martensite depending on how the carbon is distributed in the material.

What is ASTM E3?

ASTM E3, 2011 Edition, May 1, 2011 – Standard Guide for Preparation of Metallographic Specimens. The primary objective of metallographic examinations is to reveal the constituents and structure of metals and their alloys by means of a light optical or scanning electron microscope.

What do you need to know about metallographic test report?

Metallographic Test Report. Metallography is the science and art of preparing a metal surface for analysis by grinding, polishing, and etching to reveal microstructual constituents. After preparation, the sample can easily be analyzed using optical or electron microscopy.

What is the standard for preparation of metallographic specimens?

Preparation of Metallographic Specimens1 This standard is issued under the fixed designation E 3; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.

What’s the difference between metallography and metallurgical analysis?

These services are also called Metallography Evaluation, Metallographic Examination and Metallurgical Analysis. As metals are subjected to melting, cooling and working processes, the grains and crystalline structure change.

How is stainless steel tubing prepared for metallographic testing?

The surfaceof a metallographic stainless steel tubing is prepared by polishing, grinding,and etching. After preparation, it is often analyzed using optical or electron microscopy. Using only metallographic techniques, a skilled technician can identify stainless steel material properties.